package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {


    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Value("${sky.shop.address}")
    private String shopAddress;
    @Value("${sky.baidu.ak}")
    private String ak;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */

    @Transactional
    @Override
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //1.异常情况的处理（收货地址为空、购物车为空、超出配送范围）
        //判断收货地址是否为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null ){
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //检查用户的收货地址是否超出配送范围
        checkOutOfRange(addressBook.getProvinceName()+addressBook.getCityName()
                +addressBook.getDistrictName()+addressBook.getDetail());

        //查询当前用户的购物车数据
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

        //判断购物车是否为空
        if (shoppingCartList == null || shoppingCartList.size() == 0){
            //抛出业务异常
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }


        //2.向订单表插入1条数据
        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(BaseContext.getCurrentId());
        order.setPayStatus(Orders.UN_PAID);
        order.setStatus((Orders.PENDING_PAYMENT));
        order.setOrderTime(LocalDateTime.now());
        //插入数据
        orderMapper.insert(order);


        //3.向订单明细表插入n条数据
        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }
        //批量插入
        orderDetailMapper.insertBatch(orderDetailList);


        //4.清空当前用户的购物车数据
        shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());


        //5.封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();


        return orderSubmitVO;
    }


    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //TODO 微信退款操作，待开发（微信支付证书两个文件、修改参数）
        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "喂到家外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //通过WebSocketServer向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type", 1); //1 表示来单提醒 2 表示客户催单
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号"+outTradeNo);

        //通过WebSocketServer向客户端浏览器推送消息
        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }


    /**
     * 历史订单分页查询
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageQuery4User( Integer pageNum, Integer pageSize, Integer status) {
        //设置分页
        PageHelper.startPage(pageNum, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        //分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 查询出订单明细，并封装入OrderVO进行响应
        List<OrderVO> orderVOList = new ArrayList<>();
        for (Orders orders : page) {
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(orders, orderVO);
            // 查询订单明细
            orderVO.setOrderDetailList(orderDetailMapper.listByOrderId(orders.getId()));
            orderVOList.add(orderVO);
        }
        return new PageResult(page.getTotal(), orderVOList);
    }


    /**
     * 查询订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        //根据订单id查询订单表orders
        Orders orders= orderMapper.getById(id);

        //根据订单id查询订单详情表orderDetail
        List<OrderDetail> orderDetailList = orderDetailMapper.listByOrderId(id);

        //封装到OrderVO中并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }


    /**
     * 用户取消订单
     * @param id
     */
    @Override
    public void userCancelById(Long id) throws Exception {
        Orders orders = new Orders();
        orders.setUserId(BaseContext.getCurrentId());
        orders.setId(id);

        // 判断当前订单是否可取消
        // - 待付款用户可直接取消订单
        // - 待接单用户可以取消订单并退款
        // - 已接单、派送中用户不可取消订单（需要电话沟通商家）
        // - 已完成、已取消用户不可取消订单

        //根据订单id查询订单
        Orders ordersGetById = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersGetById == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //判断订单状态
        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersGetById.getStatus() > 2 ){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //TODO 微信退款操作，待开发（微信支付证书两个文件、修改参数）
//        // 待接单用户可取消订单需要进行退款
//        if (ordersGetById.getStatus() == Orders.TO_BE_CONFIRMED){
//            // 调用微信支付接口，退款
//            weChatPayUtil.refund(
//                    ordersGetById.getNumber(), //商户订单号
//                    ordersGetById.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
//
//            //支付状态修改为 退款
//            orders.setPayStatus(Orders.REFUND);
//        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());

        // 更新订单数据
        orderMapper.update(orders);
    }


    /**
     * 再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
        //清空购物车
        shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());

        //根据订单id查询订单详情表
        List<OrderDetail> orderDetails = orderDetailMapper.listByOrderId(id);

        //将订单详情表数据构造成购物车数据
        List<ShoppingCart> shoppingCartList = new ArrayList<>();
        for (OrderDetail orderDetail : orderDetails) {
            ShoppingCart shoppingCart = new ShoppingCart();
            shoppingCart.setName(orderDetail.getName());
            shoppingCart.setImage(orderDetail.getImage());
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCart.setDishId(orderDetail.getDishId());
            shoppingCart.setSetmealId(orderDetail.getSetmealId());
            shoppingCart.setDishFlavor(orderDetail.getDishFlavor());
            shoppingCart.setNumber(orderDetail.getNumber());
            shoppingCart.setAmount(orderDetail.getAmount());
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartList.add(shoppingCart);
        }
        //批量插入购物车数据
        shoppingCartMapper.insertBatch(shoppingCartList);
    }


    /**
     * 条件搜索订单
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        //条件分页查询
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        long total = page.getTotal();
        List<Orders> ordersList = page.getResult();


        //将结果封装到OrderVO
        List<OrderVO> orderVOList = new ArrayList<>();
        for (Orders orders : ordersList) {
            // 将共同字段复制到OrderVO
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(orders, orderVO);

            // 将订单菜品信息封装到orderVO中，并添加到orderVOList
            String orderDishes = getOrderDishesStr(orders);
            orderVO.setOrderDishes(orderDishes);
            orderVOList.add(orderVO);
        }

        return new PageResult(total,orderVOList);
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.listByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }


    /**
     * 各个状态的订单数量统计
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;
    }


    /**
     * 接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        //根据订单id查询订单状态
        Orders byId = orderMapper.getById(ordersConfirmDTO.getId());
        //判断订单状态是否为待接单
        if (byId.getStatus() != Orders.TO_BE_CONFIRMED){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 更新订单状态
        Orders orders = new Orders();
        orders.setId(ordersConfirmDTO.getId());
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);
    }


    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        //根据订单id查询订单状态
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());
        //判断订单状态是否为待接单
        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || ordersDB.getStatus() != Orders.TO_BE_CONFIRMED){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //TODO 微信退款操作，待开发（微信支付证书两个文件、修改参数）
//        //支付状态
//        Integer payStatus = ordersDB.getPayStatus();
//        if (payStatus == Orders.PAID) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),//商户订单号
//                    ordersDB.getNumber(),//商户退款单号
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersRejectionDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setPayStatus(Orders.REFUND);
        orders.setCancelTime(LocalDateTime.now());
        //更新数据库订单数据
        orderMapper.update(orders);
    }


    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        //根据订单id查询订单状态
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        //判断订单状态是否为待派送、派送中
        // 订单只有存在且状态为 1待付款 3已接单 4派送中 5已完成才可以取消订单
        if (ordersDB == null || (ordersDB.getStatus() != Orders.PENDING_PAYMENT && ordersDB.getStatus() != Orders.CONFIRMED
                && ordersDB.getStatus() != Orders.DELIVERY_IN_PROGRESS && ordersDB.getStatus() != Orders.COMPLETED )){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //TODO 微信退款操作，待开发（微信支付证书两个文件、修改参数）
//        //支付状态
//        Integer payStatus = ordersDB.getPayStatus();
//        if (payStatus == Orders.PAID) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),//商户订单号
//                    ordersDB.getNumber(),//商户退款单号
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        if (ordersDB.getPayStatus() == Orders.PAID){
            orders.setPayStatus(Orders.REFUND);
        }
        //更新数据库订单数据
        orderMapper.update(orders);
    }


    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id) {
        //根据订单id查询订单状态
        Orders ordersDB = orderMapper.getById(id);
        //只有订单状态为3（待派送）的订单才能派送
        //将订单状态改为派送中
        if (ordersDB == null || ordersDB.getStatus() != Orders.CONFIRMED){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = Orders.builder()
                .id( id)
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();

        // 更新数据库
        orderMapper.update(orders);
    }


    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {
        //根据订单id查询订单状态
        Orders ordersDB = orderMapper.getById(id);
        //校验订单是否存在,并且只有订单状态为4(派送中)的订单才能完成
        if (ordersDB == null || ordersDB.getStatus() != Orders.DELIVERY_IN_PROGRESS){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //将订单状态改为完成
        Orders orders = Orders.builder()
                .id( id)
                .status(Orders.COMPLETED)
                .deliveryTime(LocalDateTime.now())
                .build();

        // 更新数据库
        orderMapper.update(orders);
    }


    /**
     * 客户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        //根据订单id查询订单状态
        Orders ordersDB = orderMapper.getById(id);
        //校验订单是否存在,并且只有订单状态为payStatus 1已支付，订单状态status 2待接单 的订单才能催单
        if (ordersDB == null || (ordersDB.getStatus() != Orders.TO_BE_CONFIRMED && ordersDB.getPayStatus() != Orders.PAID)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //通过WebSocketServer向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type", 2); //1 表示来单提醒 2 表示客户催单
        map.put("orderId", id);
        map.put("content", "订单号"+ordersDB.getNumber());

        //通过WebSocketServer向客户端浏览器推送消息
        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);


    }

    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        // 创建参数Map用于存储API请求参数
        Map map = new HashMap();
        // 设置请求参数：店铺地址、返回格式json、百度地图API密钥
        map.put("address",shopAddress); // 店铺地址字符串
        map.put("output","json");// 指定返回数据格式为JSON
        map.put("ak",ak); // 百度地图API的访问密钥（AK）

        //// 发送GET请求到百度地图地理编码API,获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        // 解析返回的JSON数据
        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        // 检查API返回状态，status为"0"表示成功
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析,从返回结果中提取经纬度信息
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");// 获取纬度
        String lng = location.getString("lng");// 获取经度

        //店铺经纬度坐标,拼接经纬度为字符串格式：纬度,经度
        String shopLngLat = lat + "," + lng;

        // 更新参数Map中的地址为用户收货地址
        map.put("address",address);
        // 再次调用地理编码API，获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        // 构建请求参数Map，包含起点、终点和附加信息
        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        // 将返回的JSON字符串解析为JSONObject
        jsonObject = JSON.parseObject(json);
        // 检查API返回状态，如果status不等于"0"表示请求失败
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        // 从返回结果中提取路线信息
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        // 获取第一条路线的距离（单位：米）
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        // 校验配送距离是否超过5公里
        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException(MessageConstant.BEYOND_THE_DELIVERY_RANGE);
        }
    }
}
